参数资料
| 型号： | LTC3605IUF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/22页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 5A 24QFN |
| 标准包装： | 91 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 14.9 V |
| 输入电压： | 4 V ~ 15 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 5A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 24-QFN（4x4） |
LTC3605
OPERATION
inductance collapses abruptly when the peak design current
is exceeded. This results in an abrupt increase in inductor
ripple current and consequent output voltage ripple. Do
not allow the core to saturate!
Table 1. Inductor Selection Table
INDUCTANCE DCR MAX CURRENT DIMENSIONS HEIGHT
Vishay IHLP-2525CZ-01 Series
0.33μH 4.1m W 18A 6.7mm × 7mm 3mm
0.47μH 6.5m W 13.5A
0.68μH 9.4m W 11A
Different core materials and shapes will change the size/cur-
rent and price/current relationship of an inductor. Toroid
or shielded pot cores in ferrite or permalloy materials are
small and don’t radiate much energy, but generally cost
more than powdered iron core inductors with similar
characteristics. The choice of which style inductor to use
mainly depends on the price versus size requirements
and any radiated field/EMI requirements. New designs for
surface mount inductors are available from Toko, Vishay,
NEC/Tokin, Cooper, TDK and Wurth Electronik. Refer to
Table 1 for more details.
0.82μH 11.8m W 10A
1.0μH 14.2m W 9A
Vishay IHLP-1616BZ-11 Series
0.22μH 4.1m W 12A
0.47μH 15m W 7A
Toko FDV0620 Series
0.20μH 4.5m W 12.4A
0.47μH 8.3m W 9A
1μH 18.3m W 5.7A
NEC/Tokin MLC0730L Series
0.47μH 4.5m W 16.6A
0.75μH 7.5m W 12.2A
1μH 9m W 10.6A
Cooper HCP0703 Series
0.22μH 2.8m W 23A
0.47μH 4.2m W 17A
0.68μH 5.5m W 15A
0.82μH 8m W 13A
1μH 10m W 11A
1.5μH 14m W 9A
TDK RLF7030 Series
1μH 8.8m W 6.4A
1.5μH 9.6m W 6.1A
2.2μH 12m W 5.4A
Wurth Electronik WE-HC 744312 Series
4.3mm × 4.7mm
7mm × 7.7mm
6.9mm × 7.7mm
7mm × 7.3mm
6.9mm × 7.3mm
2.0mm
2.0mm
3.0mm
3.0mm
3.2mm
Checking Transient Response
The OPTI-LOOP compensation allows the transient re-
sponse to be optimized for a wide range of loads and
output capacitors. The availability of the ITH pin not
only allows optimization of the control loop behavior but
also provides a DC-coupled and AC-filtered closed-loop
response test point. The DC step, rise time and settling
at this test point truly reflects the closed-loop response.
Assuming a predominantly second order system, phase
margin and/or damping factor can be estimated using the
percentage of overshoot seen at this pin.
The ITH external components shown in the circuit on the
first page of this data sheet provides an adequate starting
point for most applications. The series R-C filter sets the
dominant pole zero loop compensation. The values can
be modified slightly (from 0.5 to 2 times their suggested
values) to optimize transient response once the final PC
layout is done and the particular output capacitor type and
value have been determined. The output capacitors need to
be selected because their various types and values deter-
mine the loop feedback factor gain and phase. An output
current pulse of 20% to 100% of full load current having
a rise time of 1μs to 10μs will produce output voltage and
ITH pin waveforms that will give a sense of the overall loop
stability without breaking the feedback loop.
0.25μH
0.47μH
0.72μH
1μH
1.5μH
2.5m W
3.4m W
7.5m W
9.5m W
10.5m W
18A
16A
12A
11A
9A
7mm × 7.7mm
3.8mm
Switching regulators take several cycles to respond to a
step in load current. When a load step occurs, V OUT im-
mediately shifts by an amount equal to D I LOAD ? ESR, where
ESR is the effective series resistance of C OUT . D I LOAD also
begins to charge or discharge C OUT generating a feedback
error signal used by the regulator to return V OUT to its
3605fc
12
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3606BIDD#TRPBF | IC REG BUCK SYNC ADJ 0.8A 8DFN |
| LTC3608IWKG#PBF | IC REG BUCK SYNC ADJ 8A 52QFN |
| LTC3609IWKG#TRPBF | IC REG BUCK SYNC ADJ 6A 52QFN |
| LTC3610IWP#PBF | IC REG BUCK SYNC ADJ 12A 64QFN |
| LTC3611IWP#TRPBF | IC REG BUCK SYNC ADJ 10A 64QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3606BEDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 0.8A 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LTC3606BEDD#PBF | 制造商:Linear Technology 功能描述:IC SYNC STEP-DOWN DC/DC CONVERTER DFN8 |
| LTC3606BEDD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 0.8A 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC3606BIDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 0.8A 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC3606BIDD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 0.8A 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
发布紧急采购，3分钟左右您将得到回复。